QS High-Speed Round Body Fuses

Littelfuse QS Series High-Speed Round Body Fuses provide circuit protection at the fast speeds required by modern semiconductor devices. These fuses offer extreme current limiting protection against power surges and balanced performance for longevity. L50QS and L70QS series high-speed fuses use arc-quenching stone sand to provide lower arc voltages while offering reduced l2t let-through energy and peak currents. This improved performance differentiates the QS series from other power fuses, including previous S series fuses. Universal mount bolted-end terminals give these RoHS and REACH-compliant fuses the ability to replace existing fuses in the field easily. Littelfuse QS series fuses are ideal for drive panel builders, the oil and gas industry, pulp and paper industries, motor controls, wastewater treatment plants, and other large factory settings.

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Qty. RoHS ECAD Model Series
Product
Body Style
Current Rating
Voltage Rating AC
Voltage Rating DC
Interrupt Rating
Mounting Style
Termination Style
Fuse Type
Fuse Size/Group
Indicator Style
Packaging
Littelfuse Specialty Fuses 70A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
207In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 70 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
93In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 600 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 50.8 mm x 113.49 mm Without Indicator Bulk
Littelfuse Specialty Fuses 100A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
19In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 100 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 400A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
41In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 400 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 38.1 mm x 110.31 mm Without Indicator Bulk
Littelfuse Specialty Fuses 450A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
5In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 450 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 50.8 mm x 113.49 mm Without Indicator Bulk
Littelfuse Specialty Fuses 50A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
25In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 50 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 25.4 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 100A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
71In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 100 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 25.4 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 125A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
44In Stock
Min.: 1
Mult.: 1
L50QS Specialty Fuses Round Body Fuses 125 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 30.94 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 150A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
50In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 150 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 30.94 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 200A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
52In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 200 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 30.94 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 250A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
30In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 250 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 38.1 mm x 110.31 mm Without Indicator Bulk
Littelfuse Specialty Fuses 300A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
54In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 300 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 38.1 mm x 110.31 mm Without Indicator Bulk
Littelfuse Specialty Fuses 350A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
70In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 350 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 38.1 mm x 110.31 mm Without Indicator Bulk
Littelfuse Specialty Fuses 500A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
16In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 500 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 50.8 mm x 113.49 mm Without Indicator Bulk
Littelfuse Specialty Fuses 150A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
33In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 150 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 200A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
70In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 200 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 300A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
9In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 300 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 350A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
16In Stock
Min.: 1
Mult.: 1
L70QS Specialty Fuses Round Body Fuses 350 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 600A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
20In Stock
Min.: 1
Mult.: 1
L70QS Specialty Fuses Round Body Fuses 600 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 35A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
63In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 35 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 25.4 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 90A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
62In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 90 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 25.4 mm x 92.08 mm Without Indicator Bulk
Littelfuse Specialty Fuses 225A 500VAC 500VDC FF L50QS POWR-SPEED
Datasheet
18In Stock
Min.: 1
Mult.: 1

L50QS Specialty Fuses Round Body Fuses 225 A 500 VAC 500 VDC 200 kA at 500 VAC Stud Bolt Down Fast Blow 38.1 mm x 110.31 mm Without Indicator Bulk
Littelfuse Specialty Fuses 60A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
43In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 60 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 80A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
88In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 80 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk
Littelfuse Specialty Fuses 450A 700VAC 700VDC FF L70QS POWR-SPEED
Datasheet
5In Stock
Min.: 1
Mult.: 1

L70QS Specialty Fuses Round Body Fuses 450 A 700 VAC 700 VDC 200 kA at 700 VAC Stud Bolt Down Fast Blow Without Indicator Bulk